GM Performance Parts has just released the first pair of crate engines based on the LSX Bowtie block: the LSX376 and LSX454. The LSX Bowtie block is the foundation of GMPP's LSX line, and is designed to support high horsepower LS engine combinations (read: 2,000 hp) that are suitable for the street, or racing applications. The new crate engines leverage the expertise of GM's LS engine program, but take it to the next level with race-caliber components. They join GMPP's production-based LS crate engines and engine controllers to comprise the industry's most complete lineup of LS engines, components and systems.

LSX376The LSX376 (part number 19171049) is an affordable performer that combines the economical and strong LSX block with the production LS3 engine's high-flow, L92-style cylinder heads and camshaft. Unique, forged-aluminum LSX pistons also are part of the assembly. Unique LSX376-logo valve covers distinguish the new crate engine. When fitted with a production LS3 intake manifold and injection system (not included), the LSX376 is capable of producing 450 horsepower and 430 lb.-ft. of torque. It can also be fitted with a carbureted induction system that can be tuned for greater power. The manifold and carburetor are available from GMPP.

LSX454The new LSX454 crate engine (part number 19166972) uses the LSX block, along with an all-forged rotating assembly, and a pair of GMPP's new deep-breathing LSX six-bolt cylinder heads. It's topped with a high-rise intake manifold and four-barrel carburetor, so it's a more complete turnkey assembly than the LSX376. The new LSX six-bolt cylinder heads are based on the race-derived LS7 heads from the Corvette Z06. They enable tremendous low-end torque and high-rpm power. The LSX454 is rated at 620 horsepower and 600 lb.-ft. of torque. The LSX454 is delivered in Deluxe form, so it includes everything from the carburetor to the water pump. It also comes dressed with new orange, powder-coated valve covers with "LSX454" logos engraved and painted black.